8+15.5×10-(5/4-1/4) please help

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?